Malagasy:
Comoros
> Formicidae
> Myrmicinae
> Strumigenys
> Strumigenys (koningsbergeri-group) dicomas 
See all Strumigenys (koningsbergeri-group) dicomas in All Antweb or Bolton World Catalog
See all Strumigenys (koningsbergeri-group) dicomas in All Antweb or Bolton World Catalog
Species: Strumigenys (koningsbergeri-group) dicomas
Name Status:
Taxonomic Hierarchy:
Subfamily: Myrmicinae Genus: Strumigenys
Taxonomic History (provided by Barry Bolton, 2013)
Taxon Page Author History
Taxonomic Treatment (provided by Plazi)
Bolton, B., 2000:
HOLOTYPE WORKER. TL 3.6, HL 1.01, HW 0.93, CI 93, ML 0.48, MI 47, SL 0.63, SI 67, PW 0.42, AL 0.86. With the above characters and the following. Outer margins of mandibles shallowly convex in full-face view. Upper scrobe margin bordered by a conspicuous laminate rim or flange throughout its length; eyes partially visible in full-face view. Leading edge of scape with a row of slender hairs which are slightly flattened or spoon-shaped apically. Cephalic dorsum clothed with inconspicuous small curved spatulate to narrowly spoon-shaped ground-pilosity; the upper scrobe margin fringed with hairs which are similar in shape and size as those on the dorsum; apicoscrobal hair absent. Cephalic dorsum with 6 simple standing hairs arranged in a transverse row close to the occipital margin; many paratypes have a more anteriorly situated pair near the highest point of the vertex. Dorsum of head reticulate-punctate, middorsum rugulose in larger specimens. Mesonotum with a single pair of stout standing hairs situated on anterior margin. Propodeum without a pair of short, fine, posteriorly curved hairs immediately anterior of propodeal spines. Ground-pilosity on alitrunk as on head but sparser. With the alitrunk in profile the posterior portion of the mesonotum sharply depressed, the metanotal groove represented by a shallow impression. Pronotal humeri rounded. Dorsolateral margin of posterior pronotum bluntly marginate. Anterior mesonotum with a distinct narrow carina above the mesothoracic spiracle. Propodeal spine long and slender, recurved, especially near the apex; propodeal lamella absent. Alitrunk dorsum reticulate-punctate; lateral margins of pronotum rugulose; pleurae more or less smooth centrally with peripheral reticulate-punctate sculpture. Petiole node in dorsal view finely reticulate-punctate, exposed area of cuticle slightly broader than long. Postpetiole superficially reticulate-punctate. Spongiform appendages of petiole weakly developed, with a narrow ventral curtain. Postpetiole with small but distinct lateral and ventral spongiform lobes. Basigastral costulae short and distinct; gaster smooth and shiny when clean. Dorsal surfaces of petiole, postpetiole, and gaster with stout standing hairs which are swollen apically. Colour dull yellow to light medium brown.
PARATYPE WORKERS. TL 3.6 - 4.2, HL 1.00 - 1.17, HW 0.91 - 1.11, CI 90 - 95, ML 0.48 - 0.55, MI 46 - 49, SL 0.62 - 0.70, SI 63 - 68, PW 0.41 - 0.49, AL 0.81 - 1.02 (9 measured). As holotype.
Holotype worker, Madagascar: 9.2 km. WSW Befingotra, Res. Anjanaharibe-Sud, 14 ° 45 ' S, 49 ° 28 ' E, 1200 m., 9. xi. l 994, sifted litter (leaf mold rotten wood), montane rainforest # 1192 (12) - 14 (B. L. Fisher) (MCZ). Paratypes. 9 workers and 2 queens (dealate) with same data as holotype but coded (3) - 9, (23) - 9, (24) - 9, (24) - 10, (29) - 8, (36) - 9, (40) - 4, (50) - 10, (L. O.) - IO (BMNH, SAM).
NON-PARATYPIC MATERIAL EXAMINED. Madagascar: R. S. Manongarivo, 10.8 km. 229 ° SW Antanambao, 400 m. (B. L. Fisher); R. S. Manongarivo, 12.8 km. 228 ° SW Antanambao, 780 m. (B. L. Fisher); R. S. Manongarivo, 14.5 km. 220 ° SW Antanambao, 1175 m. (B. L. Fisher); 9.2 km. WSW Befingotra, Res. Anjanaharibe-Sud, 1280 m. (B. L. Fisher); RNI Marojejy, 375 m., 665 m. (G. D. Alpert); 55 km. S Antalaha, Nosy Ngontsy, 1 m. (Alpert ei al.); 19 km. ESE Maroantsetra, 350 m. (P. S. Ward); 5.3 km. SSE Ambanizana, Andranobe, 425 m. (B. L. Fisher); 6.9 km. NE Ambanizana, 825 m. (B. L. Fisher); Nosy Mangabe, 20 m. (P. S. Ward); S. F. Tampolo, 10 m. (B. L. Fisher); Causse de Kelifely (A. Peyrieras); Route d'Andriamena (A. Peyrieras); Foret d'Andranobe, Road to Andriamena 1200 m. (J. - M. Betsch); F. C. Sandranantitra 450 m. (H. J. Ratsirarson); F. C. Didy 960 m. (H. J. Ratsirarson); F. C. Andrianantantely 530 m. (H. J. Ratsirarson); P. N. Mantadia 895 m. (H. J. Ratsirarson); Perinet (W. L. Brown); Andasibe, 870 m. (Alpert et al.); For. d'Ambatofitorahana 293 - 294 km. on route national no. 7, 1800 m. (J. - M. Betsch); 3 km. W Ranomafana, 950 m. (P. S. Ward); Ranomafana Nat. Park, Maharira Forest, 1130 m. (E. Rajeriarison); Ranomafana Nat. Park Andranobe, Vohiparara Forest, 1160 m. (E. Rajeriarison); 45 km. S Ambalavao, 785 m. (B. L. Fisher); 11 km. NW Enakara, Res. Andohahela, 800 m. (B. L. Fisher).
The non-paratypic material shows greater size variation than the type-series alone: HL 0.86 - 1.09, HW 0.75 - 1.04, CI 87 - 95, ML 0.41 - 0.52, MI 42 - 50, SL 0.53 - 0.68, SI 61 - 75 (12 measured), but otherwise matches all diagnostic characters.
S. dicomas is widely distributed but easily recognized. In the Malagasy region it is the only species with mandible shape and dentition as described in the diagnosis above.
HOLOTYPE WORKER. TL 3.6, HL 1.01, HW 0.93, CI 93, ML 0.48, MI 47, SL 0.63, SI 67, PW 0.42, AL 0.86. With the above characters and the following. Outer margins of mandibles shallowly convex in full-face view. Upper scrobe margin bordered by a conspicuous laminate rim or flange throughout its length; eyes partially visible in full-face view. Leading edge of scape with a row of slender hairs which are slightly flattened or spoon-shaped apically. Cephalic dorsum clothed with inconspicuous small curved spatulate to narrowly spoon-shaped ground-pilosity; the upper scrobe margin fringed with hairs which are similar in shape and size as those on the dorsum; apicoscrobal hair absent. Cephalic dorsum with 6 simple standing hairs arranged in a transverse row close to the occipital margin; many paratypes have a more anteriorly situated pair near the highest point of the vertex. Dorsum of head reticulate-punctate, middorsum rugulose in larger specimens. Mesonotum with a single pair of stout standing hairs situated on anterior margin. Propodeum without a pair of short, fine, posteriorly curved hairs immediately anterior of propodeal spines. Ground-pilosity on alitrunk as on head but sparser. With the alitrunk in profile the posterior portion of the mesonotum sharply depressed, the metanotal groove represented by a shallow impression. Pronotal humeri rounded. Dorsolateral margin of posterior pronotum bluntly marginate. Anterior mesonotum with a distinct narrow carina above the mesothoracic spiracle. Propodeal spine long and slender, recurved, especially near the apex; propodeal lamella absent. Alitrunk dorsum reticulate-punctate; lateral margins of pronotum rugulose; pleurae more or less smooth centrally with peripheral reticulate-punctate sculpture. Petiole node in dorsal view finely reticulate-punctate, exposed area of cuticle slightly broader than long. Postpetiole superficially reticulate-punctate. Spongiform appendages of petiole weakly developed, with a narrow ventral curtain. Postpetiole with small but distinct lateral and ventral spongiform lobes. Basigastral costulae short and distinct; gaster smooth and shiny when clean. Dorsal surfaces of petiole, postpetiole, and gaster with stout standing hairs which are swollen apically. Colour dull yellow to light medium brown.
PARATYPE WORKERS. TL 3.6 - 4.2, HL 1.00 - 1.17, HW 0.91 - 1.11, CI 90 - 95, ML 0.48 - 0.55, MI 46 - 49, SL 0.62 - 0.70, SI 63 - 68, PW 0.41 - 0.49, AL 0.81 - 1.02 (9 measured). As holotype.
Holotype worker, Madagascar: 9.2 km. WSW Befingotra, Res. Anjanaharibe-Sud, 14 ° 45 ' S, 49 ° 28 ' E, 1200 m., 9. xi. l 994, sifted litter (leaf mold rotten wood), montane rainforest # 1192 (12) - 14 (B. L. Fisher) (MCZ). Paratypes. 9 workers and 2 queens (dealate) with same data as holotype but coded (3) - 9, (23) - 9, (24) - 9, (24) - 10, (29) - 8, (36) - 9, (40) - 4, (50) - 10, (L. O.) - IO (BMNH, SAM).
NON-PARATYPIC MATERIAL EXAMINED. Madagascar: R. S. Manongarivo, 10.8 km. 229 ° SW Antanambao, 400 m. (B. L. Fisher); R. S. Manongarivo, 12.8 km. 228 ° SW Antanambao, 780 m. (B. L. Fisher); R. S. Manongarivo, 14.5 km. 220 ° SW Antanambao, 1175 m. (B. L. Fisher); 9.2 km. WSW Befingotra, Res. Anjanaharibe-Sud, 1280 m. (B. L. Fisher); RNI Marojejy, 375 m., 665 m. (G. D. Alpert); 55 km. S Antalaha, Nosy Ngontsy, 1 m. (Alpert ei al.); 19 km. ESE Maroantsetra, 350 m. (P. S. Ward); 5.3 km. SSE Ambanizana, Andranobe, 425 m. (B. L. Fisher); 6.9 km. NE Ambanizana, 825 m. (B. L. Fisher); Nosy Mangabe, 20 m. (P. S. Ward); S. F. Tampolo, 10 m. (B. L. Fisher); Causse de Kelifely (A. Peyrieras); Route d'Andriamena (A. Peyrieras); Foret d'Andranobe, Road to Andriamena 1200 m. (J. - M. Betsch); F. C. Sandranantitra 450 m. (H. J. Ratsirarson); F. C. Didy 960 m. (H. J. Ratsirarson); F. C. Andrianantantely 530 m. (H. J. Ratsirarson); P. N. Mantadia 895 m. (H. J. Ratsirarson); Perinet (W. L. Brown); Andasibe, 870 m. (Alpert et al.); For. d'Ambatofitorahana 293 - 294 km. on route national no. 7, 1800 m. (J. - M. Betsch); 3 km. W Ranomafana, 950 m. (P. S. Ward); Ranomafana Nat. Park, Maharira Forest, 1130 m. (E. Rajeriarison); Ranomafana Nat. Park Andranobe, Vohiparara Forest, 1160 m. (E. Rajeriarison); 45 km. S Ambalavao, 785 m. (B. L. Fisher); 11 km. NW Enakara, Res. Andohahela, 800 m. (B. L. Fisher).
The non-paratypic material shows greater size variation than the type-series alone: HL 0.86 - 1.09, HW 0.75 - 1.04, CI 87 - 95, ML 0.41 - 0.52, MI 42 - 50, SL 0.53 - 0.68, SI 61 - 75 (12 measured), but otherwise matches all diagnostic characters.
S. dicomas is widely distributed but easily recognized. In the Malagasy region it is the only species with mandible shape and dentition as described in the diagnosis above.
Specimen Data Summary
Found most commonly in these habitats: 56 times found in rainforest, 36 times found in montane rainforest, 13 times found in montane forest, 4 times found in Disturbed montane rainforest, 7 times found in tropical dry forest, 2 times found in transition humid forest, 4 times found in littoral rainforest, 2 times found in Disturbed montane forest, 3 times found in forest, 1 times found in lowland rainforest, ...
Collected most commonly using these methods or in the following microhabitats: 11 times 9 MaxiWinks, mixed samples, 18 times MW 25 sample transect, 5m, 16 times MW 50 sample transect, 5m, 5 times 03 MaxiWinks, mixed samples, 2 times 7 MaxiWinks, 5 times 10 MaxiWinks, mixed samples, 2 times 5 MaxiWinks, mixed samples, 2 times 10 maxi winks, 7 times Winkler app., 3 times Malaise trap, 7 times pitfall trap, PF 50 traps, 11 cm dbh with water, soap, formalin, nonlinear placement, ...
Elevations: collected from 1 - 1800 meters, 767 meters average
11 Specimens Imaged | View All 283 Specimens for this species
CASENT0005518
CASENT0005519
CASENT0005520
CASENT0005521
CASENT0052908
CASENT0133607
CASENT0135118
CASENT0137196
CASENT0137544
CASENT0499800
CASENT0900701
Enlarge Map
TOOLS:
View:
- Browse
Specimens for this species
(283
examples)
- View Strumigenys (koningsbergeri-group) dicomas in Google Earth
Comparison Tool:
- Compare images of the Specimens within this speciesCatalog:
- See Hymenoptera Name ServerDownload:
Copyright © 2002-2013.
Use of this web site and information available from it is subject to our Attribution-Share Alike Creative Commons License. We encourage non-commercial use of ant web images. Each image must be attributed to its photographer and to www.antweb.org.
Antweb is funded from private donations and from grants from the National Science Foundation, DEB-0344731 and EF-0431330.
Use of this web site and information available from it is subject to our Attribution-Share Alike Creative Commons License. We encourage non-commercial use of ant web images. Each image must be attributed to its photographer and to www.antweb.org.
Antweb is funded from private donations and from grants from the National Science Foundation, DEB-0344731 and EF-0431330.
AntWeb is hosted by The California Academy of Sciences.